Chalkboard



FIG. 1 is a front, left side and top perspective view of a chalkboard showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is an enlarged top view thereof; and,

FIG. 7 is an enlarged bottom view thereof. 

CLAIM The ornamental design for a chalkboard, as shown and described. 